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andriy [413]
3 years ago
7

What is the main function of the B lymphocyte?

Biology
2 answers:
d1i1m1o1n [39]3 years ago
8 0
The answer is B.produce antibodies when triggered by antigens
Naily [24]3 years ago
5 0
B.produce antibodies when triggered by antigens
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3. Large molecules and wastes move<br> through the membrane through
madreJ [45]

Answer: Large molecules and wastes move through the membrane through forms of active transport- endocytosis and exocytosis.

Explanation:

Molecules are moved across the cell membrane via different mechanisms like diffusion, facilitated diffusion and passive transport; however, some very large molecules require specialized types of active transport to cross over- these are endocytosis and exocytosis.

During endocytosis large molecules cells and cell fragments moved across the plasma membrane through a process of <em>invagination;</em> piece of the external cell membrane falls into itself and forms a small pocket that surrounds the target molecule this breaks off from the membrane to form an intracellular vesicle. Different methods of endocytosis such as <em>phagocytosis, pinocytosis </em>and receptor-mediated <em>endocytosis</em>, take in cells,  water and targeted substances respectively.

Like endocytosis, the particles (signal proteins, neurotransmitters and waste material) are surrounded by a phospholipid membrane. However, in exocytosis, this membrane is formed in the cytoplasm, and merges with the plasma membrane’s interior in a process <em>opposite to </em>endocytosis; material is removed from the cell and exported into the cell’s exterior called the extracellular space.

6 0
3 years ago
Several species of leopard frogs are common throughout North America, where their ranges overlap. Different species of leopard f
MrMuchimi

the correct answer is A- Reproductive isolation occurred through behavioral isolation

A process of formation of a new species from an existing species is called speciation. New species may formed due to geographical or reproductive barriers which isolates the members of a population of a species to form a new species.

In the given question, speciation in In the leopard frogs occurred due to a particular or specific call given by males to the females. The courtship call lead to reproductive isolation due to change in behavior. Such type of behavioral change will help in recognizing mates of the same species and this will act as a reproductive barrier among the other related species.


4 0
3 years ago
What ways can help a Giant Panda from going extinct?
steposvetlana [31]

Answer: Use less paper

Explanation:

Giant pandas live on bamboo, which is scarce because bamboo trees are being cut down to make paper, which is destroying their natural habitat and only food source. By not using fewer paper products, you are helping to protect pandas from extinction.

6 0
2 years ago
Read 2 more answers
Which of the following choices is not a key characteristic to differentiate cancer cells from normal cells?
nataly862011 [7]

Answer:

cells that should not invade other tissues do invade other tissues

Explanation:

6 0
3 years ago
Disaccharides include what sugar molecules. True or False?
AURORKA [14]
If this answers your question:
Disaccharides are formed when 2 sugar molecules combine. An example of this is Maltose
8 0
3 years ago
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